Attachment for sewing-machines



A; H. DE'VOE. ATTACHMENT FOR SEWING MACHINES.

APPLICATION FILED DEC. 2, 191B- 11,359,877. Patenfed ITO v.23, 1920.

' F ig1;

WITNESSES: A INVENTOR NEY section is excluded.

UNETED STA s PATENT orrlcs.

ALBERT 11. DE VOE, or WESTFIELD, ew JERSEY, ASSIGNOR '10 THE smenn MANU- FACTUBING coMrANY, A coaronarron or NEW JERSEY.

ATTACHMENT, non SEWING-MACHINES.

v Patented Nov. 213, 1920.

Application filed December 2,1918. Serial No. 264,898.

To all w loom it may concern:

Be it known that I, AL ERT H. DE Von, a citizen ofthe United States, residing at l Vestfield, in the county of Union and State of New Jersey, have invented certain new and useful Improvements in Attachments for Sewing-Machines, of which the following is a specification, reference being had therein to the accompanying drawings.

This invention relates to attachments for sewing machines and more particularly to the type of attachments known as hemmers.

The introduction and removal of work from'hemmers requires dexterity of an order not possessed by all operatives and it has long been found desirable to construct such devices in sections one of which may be conven ently displaced, shifted or otherwise moved to facilitate the introduction of work. 7

The present invention is applied to such type of hemmers and. aims to provide new and improved mechanism for shifting one section of the hemmer in a prescribed path not likely during thedisplacement to disarrange' the previously formed hem, in the case of circular work, and in all cases requiring a minimum of time and energy to operate.

In its preferred form the construction comprises a hemmerdivided longitudinally into base and roof which is integral witha base-plate grooved transversely of an extension from the latter (2110. roof) section' which is thereby confined to move in a vertical plane transverse, the line of feed. Lift and shift levers are arranged to simultaneously reciprocate andeleva-te the roof section and these levers are both actuated by a tre adle operable lever in one case through a projection thereen andin the other case through a toggle linkage that shifts the V K V n from the base section and then backtoward it, the lif-t lever being timed to elevate the roof section when'liabi'lity of disarrangement ofthe hem by the base In this way the roof section may be moved outwardly, upwardly and backwardly from a position in hemming relation with the base-section to a position to the opposite side of and above the basesection. I i

The invention is illustrated in the accomroof section first away sec i ns t o m of a the line of feed to receive panying drawings in which Figure l is a plan View of the attachment applied to a, sewing machine. Fi 2 is a side elevation of the same, part of the apron depending eipose the construction, and Fig. ,3 is a detail in side elevation vof the roof section of the hemmer. i

The device may beused with any suitablesewing machine, as illustrated, being from the cloth-plate being broken away to springs 8 being attached to the .coverT-slide to yieldingly retain the same in place against 1 displacement during the operation of the machine when vibration is likely.

Mounted on the cover-slide is'a base-plate 9 which is provided witha slot 10 receiving 9 cl amp-screws 11 for adj ustab'ly: securing the base-plate to the cover-slide. Upstanding vparallel ribs 12 on thebase-plate define a vgroove 13 disposedtransversely of the line of seam-formation. 0 one side of thebase- .plate 9 and in advance of the: needle-hole 1 is soldered or otherwise suitably secured a base-section l i of-thchemmer which has ,a

concaved upstanding wall '15. 'This wall 15' terminates in a substantially straight edge 16into contact: with which a similar straight edge of the convolute roof section 17 is adapted to be brought to complete the continuity of the hemmer. Thesection'al heminer thus constitutedv' is similar" in operation to those on the market and needs nofurther' description. v I I The" roof section 17 1s soldered. or otherwise suitably secured to a bar: or slidefi1-8 of the irregular shape shown. bestin Fig. 3-

and theslidelB is received within the'groove or channel 13 defined by' the-upstanding ribs 12.

The slide 18 provided 'its righthand side, as shown in :Fig.-3, with a pin 19-which is received within the slot 20 provided in the front upstanding'rib 12. By this pin and slot connection the roof section 17 of thehemmer is permitted to be. shifted .parallel with the cloth-plateand to-be swung in a direction transversethe cloth-plate.

confine the roof section in cooperative hemming relation with the base section a coiled spring 21 reacting against the abutment 22 is arranged to urge the roof section toward the right as viewed in Fig. 2. I A pin 23, in the rear upstanding rib l2" and adapted to enter the open-ended slot in the lower part of the slide 18, also assists in confining the roof section of the hemmer when it is about to move mto or away from cooperative hemming relation with the base-section.

The construction thus far described is a or shifted from its normal working relation with the base section in a cur'vedpath by the combined action of two levers, one, a lift lever 25, pivoted at 26 to the front upstanding rib l2 and having a depending end 27 by which it may be lifted to engage a pin 28 extending forwardly from the slide 18 carrying the roof section of the hemmer, and the other a vertically arranged shift lever 29 pivoted at 30below the cloth-plate of the machine with its upper end 31 proj'ecting through a slot 31 in the cloll'rplate above which it is connected to the roof section of the hemmer by a link 32 carrying a pin 33adapted to seat in an upwardly open 2 slot 3%- in an enlarged portion 35 of the bar or slide 18. A spring 36 coiled about the pivotal connect1on between the link 32 and the shift lever 29 has its opposite free ends caught about the link and shift lever and tends to hold the pin 33 in the slot,

of the slide 18. This last-mentioned constructlon constltutes a detachable connection that permit removal of the hemmer per so when it is desiredto clear the cloth-plate for general stitching.

' The lift lever 25 and theshift lever 29 are both actuated from a manually operable lever 37 whichis fulcrumed on tie stud-pin 38 and is normally held in an elevated posilever 25. The manually operable lever37 at its free end is connected to an intermediate portion of the shift lever 29 by a toggle link 41. Connected to thelever 37 through a perforation in an car 42 is'a rod or wire 43 that may be operated by a treadle or knee shift (not shown) in a manner Well understood.

It will be noticed that the link 41 has a toggle action upon the shift lever 29. This will be clear upon inspection of Fig. 2 of the drawings by comparison of the positions assumed by the lever 37 and link 41 with relation to the shift lever 29 indicated by dotted and solid lines, the latter showing the linkage in the position occupied by its parts when the. roof section of the hemmer is in cooperative hemming relation with the base section and the former when in noncooperative relation. By a single down stroke of the manually operable lever 37 the shift lever is first shifted to the left (viewed as in Fig. 2), then its direction of motion is reversed and it is shifted to the right. While the roof section is being shiftedthrough the shift lever 29 and toggle 41, the finger or projection 40 moves into contact with the down-turned end or cam portion 27 of the lift lever 25 and elevates the roof section. The result is that the roof section is moved in a curved path. Preferably the roof section is not raised or elevated by the lift lever 25 until the arbor portion 17" has been moved to the left beyond the edge or edgefold of the hem, the delay being insured by the pin-and-slot connection 23-24. v By delaying the timing of' the lift levers action as mentioned liability of disarrangement of the condition of the hem in the completion of circularwork is avoided. When the ,100 lever 37 is released to the action of its own spring the operations are. of course reversed.

WVhile the invention has been illustrated and described as applied to a sectional hemmer it will be obvious thatit is capable of 5'- application toa hinder or other folder and in its broader aspects includes the application of the mechanism to any sort of an attachment wherein is employed a part or section that it is desirable to shift at one time or another.

7 Having thus set forth the nature of the invention, whatl claimherein is- 1. A. folder for sewingmachines having base and roof sections separable to facilitate the introduction and removal of work, and means for shifting said roof section outwardly, upwardly and laterally from a normal working position in which the folder is capable of folding material to an abhormal position in which the folder is not capable of folding material.

2. A sect'ional'folder for sewing machines having at least two relatively separable sections, means for maintaining said sections together in cooperative relation and 'means for shifting one of said sections from a working osition at one side to an inoperative pos1t1011 at the other side of the rest of the folder.

.. parallel longitudinally into base 3. A hemmer for sewing machines divided and roof sections, said roof section being shiftable to opposite sides of the base section, and treadle oper-.

hammer sections 1n directions substantially work-support whereby one of the hemmer sections may the material being hemmed.

, levers. v

9. A hemmer for sewing machines divided 5. A folder for sewing machines having separable sections, mechanism for shifting one of said sections in a curved path including lifting and shifting devices and a common actuator for simultaneously operatingsaid devices. V 7 V 6. A folder for sewing machines having separable sections in combmatlon w1th means for shifting one section relative toanother including a lever and a toggle mechanism for operating the same adapted to move it in a plurality of different directions during operation of the toggle mechanism in a single direction,

Y 7 A hemmer for sewing machines hav-.

ing a base-plate provided with a groove, a base section fixed to said base-plate, a roof section, aslide supporting the roof section and movably arranged within said groove, means connecting said slide and base-plate permitting movement of the roof section in a curved path, a lift lever for elevating and a shift lever for reciprocating the roof section, a manually operable lever, and devices connected to said manually operable lever for actuating the lift and shift levers to move the roof section to and. from normal hemming relation with the base section. V

8. A folder for sewing machines having complementary portions, means for relatively moving said portions including lift and shift levers for elevation and reciprocation respectively of one of the complementary portions, and a manually operable lever for actuating the first mentioned l mer, lever by movement of the manually operwith and perpendicular to the.

be shifted without disarrang- 7 into sectionsfor separation to facilitate introduction and removal of the work, a

spring for yieldingly holding the sections in normal cooperative hemming relation,

mechanism for shifting one of the sections.

to and from its normal hemming position including a manually operable lever. a lift lever, means connected to the manually operable lever for actuating the lift lever .a shift lever, means operatively connecting the'shift lever and one section of'the hemand means for reciprocating the shlft able lever in one direction.

10. A hemmer for sewing machines divided into sections for separatiommeans for maintaining said sections in cooperative hemming relation, shift and lift levers for moving one of said sections to and out of the way position facilitating the introduction of work, a manually operable lever havand also having a linkconnection with the shift lever, and means cooperating with the shift and lift levers to transmit their motions compounded to said one movable sec tion of the hemmer.

for sewing machines div 11. A hemmer vided into sections for separation, means for maintaining said sections in cooperative hemming relation, shift and lift levers for moving oneof said sections to a position facilitating the. introduction and removal of work, a treadle operable lever having an element fixed thereto for operating the lift lever, a link connecting the shift lever with the treadle lever so asto have a toggle action, and a spring for normally holding the treadle op'erable'lever in a position in which the sections of the hemmer are in 00-. operative hemming relat1on. I 12. A .hemmer for sewing machines d1-- vided into sections for separation, a slide,

with an overhanging free end by which one of the sections isfcarrled, means confining 'movement of'said slider to a predetermined plane, a compound pivotal and, sliding connection between the slide and the means confining it, means for shifting the slide, means for swinging the slide, and means for confining the slide to move in .a substantially straight line during the last part of its movement when the sections of the hemmer are brought into cooperative workingrelaj 1 tion capableof forming material into a hem.

In testimony whereof, I have signed my name to this specification. 1

{ ALBERT H. nElvoE. f

8() ing a projection for operating the lift lever 

